Answers

Add 28/84 and 45/12

1^st number: 28/84, 2^nd number: 3 9/12

28/84 + 45/12 is 49/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   28/84 = 28 × 1/84 × 1 = 28/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   45/12 = 45 × 7/12 × 7 = 315/84
4. Add the two like fractions:
   28/84 + 315/84 = 28 + 315/84 = 343/84
5. 343/84 simplified gives 49/12
6. So, 28/84 + 45/12 = 49/12
   In mixed form: 41/12

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁵⁶/₈₄+⁴⁵/₁₂ ²⁸/₈₄+⁹⁰/₁₂ ²⁸/₈₄+⁴⁵/₂₄ ²⁸/₈₄+⁴⁵/₃₆ ²⁸/₈₄+⁴⁵/₆₀ ²⁸/₈₄+⁴⁵/₈₄

Add Fractions Calculator